build: add support for rust proc-macro crates

1 files changed, 3 insertions, 3 deletions

diff --git a/BUILD.gn b/BUILD.gn
index 426816c75..909d04ce5 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -13,8 +13,8 @@ group("default") {
 
 rust_executable("hyper_hello") {
   source_root = "tools/hyper_hello.rs"
-  extern = [
-    "$rust_build:hyper",
-    "$rust_build:ring",
+  extern_rlib = [
+    "hyper",
+    "ring",
   ]
 }